will pay for sub enclosure design

ok heres the deal i had a guy design a box for my Ascendant Audio Avalanch 15
but he messed up and gave me a design for a 12" sub but it wasnt realized until the cutout for the sub was made so needless to say i have a prototype custom enclosure sitting in my garage pissing me off while my beautiful new Ascendant Audio Avalanch is homeless so i need a enclosure design so i can give it a home.

here are the absolute max dimensions for the car its a 99 civic sedan
16" tall
36" wide
33" deep

i was looking for sql or spl i know sealed is the easiest route but i kind of want the best of both worlds please pm me if you can help need this done asap woofers been sitting in my garage for 2 weeks now